Ceanothus diversifolius |
Ceanothus dentatus |
|
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pine mat |
cropleaf ceanothus, dwarf ceanothus, sandscrub ceanothus |
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Habit | Shrubs, evergreen, 0.2–0.3(–0.5) m, matlike. | Shrubs, evergreen, 0.5–1.5 m. Stems erect, ascending or spreading, not rooting at nodes; branchlets brown to reddish brown, not thorn-tipped, round in cross section, rigid, puberulent. |
Stems | spreading, sometimes rooting at nodes; branchlets green, sometimes tinged red, not thorn-tipped, usually round, sometimes angled, in cross section, flexible, puberulent. |
|
Leaves | petiole 3–11 mm; blade flat, elliptic to widely ovate, 12–45 × 6–20 mm, base obtuse to rounded, margins serrulate to denticulate, not revolute, usually not wavy, sometimes wavy, teeth 27–42, apex ± obtuse to rounded, abaxial surface pale green, pilosulous, adaxial surface green, pilosulous; usually pinnately veined, rarely 3-veined from base. |
petiole 1–2 mm; blade flat to cupped, narrowly elliptic to narrowly oblong or linear, 5–16 × 2–8 mm, base obtuse, margins obscurely glandular-denticulate, strongly revolute, glands 14–36, apex truncate to retuse, abaxial surface pale green, villosulous to strigillose, especially on veins, adaxial surface dark green, strigillose, not glandular papillate; pinnately veined, veins not furrowed. |
Inflorescences | axillary, umbel-like to racemelike, 1.3–4 cm. |
axillary or terminal, racemelike, 1.5–3 cm. |
Flowers | sepals, petals, and nectary usually blue to pale blue, rarely white. |
sepals, petals, and nectary deep blue. |
Capsules | 4–5 mm wide, weakly lobed near apex; valves smooth, crested. |
2.5–4 mm wide, not lobed to weakly lobed; valves smooth, crested or not. |
Ceanothus diversifolius |
Ceanothus dentatus |
|
Phenology | Flowering Apr–Jun. | Flowering Mar–Jun. |
Habitat | Well-drained slopes and canyons, open to shaded sites, mixed evergreen and conifer forests. | Sandy soils, slopes, flats, maritime chaparral, cypress and pine forests. |
Elevation | 700–2300 m. (2300–7500 ft.) | 0–50 m. (0–200 ft.) |
Distribution |
CA
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CA
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Discussion | Ceanothus diversifolius occurs in the North Coast Ranges and the western slopes of the Cascade Range and the Sierra Nevada; it often forms mats to two meters wide. Marginal teeth on young leaves are notable in having more or less persistent, narrowly conic glands, not seen elsewhere in Ceanothus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Ceanothus dentatus is a narrow endemic, restricted to the Monterey Bay region. Some specimens of this species have been mistaken for C. papillosus. Papillose glands are restricted to leaf blade margins and are absent from adaxial leaf surfaces in C. dentatus, but are evenly distributed over the adaxial leaf surfaces in C. papillosus. Putative hybrids between C. dentatus and C. griseus have been named C. ×lobbianus Hooker (M. Van Rensselaer and H. McMinn 1942). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 94. | FNA vol. 12, p. 92. |
Parent taxa | Rhamnaceae > Ceanothus > subg. Ceanothus | Rhamnaceae > Ceanothus > subg. Ceanothus |
Sibling taxa | ||
Synonyms | C. decumbens | C. dentatus subsp. floribundus, C. floribundus |
Name authority | Kellogg: Proc. Calif. Acad. Sci. 1: 58. (1855) | Torrey & A. Gray: Fl. N. Amer. 1: 268. (1838) |
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